DE8813788U1 - Water-cooled high-current cable - Google Patents

Description

t * MM · t t · · t « t

-3-Description

The invention relates to a high-current cable of the type defined in the preamble of claim 1. Such a high-current cable is described in DE-PS 23 53 364.

The rotating mounting of the cooling water hose on the connector for the high-current cable is intended to prevent torsional stress on the cooling water hose when the consumer moves relative to the tap. The previously known mounting, in which the sleeve carrying the cooling water hose sits directly on the connector, is in need of improvement in that the rotating mobility of the sleeve on the connector is not guaranteed in the long term, especially under conditions such as those that prevail in melting plants. It has therefore already been suggested that ball bearings be inserted between the connector and the sleeve (DE-P8 34 20 822), but the limited heat transfer from the sleeve to the cooled connector via the ball bearings is disadvantageous. The connector using ball bearings is also comparatively large, which again proves to be a disadvantage in view of the generally cramped installation situation of such high-current cables.

Il ·· I 1ItIfIfI It «4 I* ti I » _· · · _·*_

• t « « f ·· »t

-4-

Based on the prior art described above, the invention is based on the need for a mounting of the cooling water hose on the connector for a high-current cable that avoids torsional stresses and avoids the disadvantages outlined.

^: The need is met with a generic high current

cable is taken into account according to the invention by inserting conductor bands made of good

' heat-conducting material and between the

Shoulder of the connector as well as the fastening ring and the corresponding end faces of the sleeve sliding discs.

. From the surface contact between the sliding bands and

■ the sliding discs with the sleeve on the one hand and with the

' connector on the other hand results in the desired good

Heat transfer from the casing to the curved connector, furthermore this solution is also desirably smaller than the previously known solution using ball bearings.

The sliding binders and the oil-conducting disks are expediently made of electrically conductive material in order to dissipate the inductive voltage that builds up in the sleeve.

-5-

Polytetrafluoroethylene (PTFE) has proven to be a particularly suitable material for the sliding belts and sliding disks. This does not, of course, exclude the use of other suitable sliding materials. Further structural developments of the invention are set out in subclaims 3 to 6.

The invention is explained in more detail in the drawing using an embodiment shown schematically.

The cables 111, 111'... of the cable 11 are pressed into the cable head or the connector 21 with a molded-on connection lug 211 for connecting (212) the cable 11 to a consumer (not shown) at the end 213 facing away from the connection lug 211. The cooling water hose surrounding the high-current cable 11 is secured by means of tensioning straps 36 to the sleeve 31 which is rotatably mounted on the cylindrical region 214 of the connector 21 extending between the end 213 attached to the cable 11 and the connection lug. To improve the rotational mobility (double arrow A) of the sleeve 31 on the connector 21, the sleeve 31 carrying the cooling water hose 12 is mounted on the connector 21 in a special way, taking into account the cramped installation situation for such high-current cables 11.

-6-

The sleeve 31 is supported on the circumference of the stepped cylindrical part 214 of the connecting piece 21 by a plurality of sliding bands 41 provided at intervals and wrapping around the connecting piece 21, which in the case shown are inserted with an upper projection into recesses 216 in the connecting piece 21. The sleeve 31 is supported against the shoulder 217 delimiting the stepped area 214 of the connecting piece 21 at the end facing away from the connecting tab 211 by a sliding disk 42, which in the case shown is inserted with an upper projection into a recess 311 in the corresponding end face of the sleeve 31. The sleeve 31 is supported and thus fixed in the axial direction on the bearing point 214 of the connecting piece 21 by a snap ring 27 placed in the upper part 218 of the offset part 214 of the connecting piece 21 with the insertion of a sliding disk 43 mounted with the upper part in a support ring 26 (261).

The reference numeral 46 designates ring seals inserted in ring grooves 312 in the sleeve 31.

The cable head, i.e. the connector 21, is usually made of copper or a suitable copper alloy, the sleeve 31 of non-magnetizable steel or brass. A composite material made of a sintered metal, in particular bronze with embedded PTFE, is suitable as a material for the sliding bands 41 and the sliding disks 42, 43.

-7-

Instead of sliding binders, bushings can also be used, but these are more expensive than sliding tape, which is available by the meter. When using bushings, you are then also limited to materials that allow the bushing to be installed.

Claims (7)

a « « « , , „ a « a &agr; » · a a a t a· at aa -1-Protection claims 1. Water-cooled high-current cable extending between connectors, the cooling water hose of which is fixed to a sleeve that can rotate relative to the connectors, the sleeve being supported on the inside by a shoulder of the connector and being supported on the opposite side by a fastening ring, characterized in that sliding bands (41) made of good heat-conducting material are inserted between the corresponding jacket surfaces of the connector (21) and the sleeve (31), and sliding disks (42) are inserted between the shoulder (217) of the connector (21) and the fastening ring (27) and the corresponding end surfaces of the sleeve (31). or 43). 2. High-current cable according to claim 1, characterized in that the sliding bands (41) and/or the sliding disks (42 or 43) consist of electrically conductive material. 3. High-current cable according to claim 1 or claim 2, characterized in that the sliding strips (41) arranged between the corresponding outer surfaces of the connecting piece (21) and the sleeve (31) are embedded with an upper projection in recesses (e.g. 216) in the connecting piece (21) or in the sleeve (31). -2- 4. High-current cable according to one of claims 1 to 3, characterized in that the sliding disk (42) arranged between the shoulder (217) of the connecting piece (21) and the corresponding end face of the sleeve (31) is embedded with its upper projection in a recess (e.g. 311) in the connecting piece (21) or in the sleeve (31). 5. High-current cable according to one of claims 1 to 4, characterized in that a metallic support ring (26) is inserted between the fastening ring (27) which supports the sleeve (31) in a position-fixing manner and the sliding disk (43) arranged in front of it. 6. High-current cable according to claim 5, characterized in that the support ring (26) is provided on the contact side with a recess (261) into which the sliding disk (43) is embedded with an upper projection . 7. High-current cable according to one of claims 1 to 6, characterized in that the sliding bands (41) and the sliding disks (42, 43) consist of a composite material made of a sintered metal with embedded PTFB.